From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 93D4AC433F5 for ; Mon, 13 Sep 2021 12:08:36 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 2A1E160F9B for ; Mon, 13 Sep 2021 12:08:36 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 2A1E160F9B Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=nongnu.org Received: from localhost ([::1]:46848 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mPklH-0000gP-40 for qemu-devel@archiver.kernel.org; Mon, 13 Sep 2021 08:08:35 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:42898) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mPkb0-0002ps-R7 for qemu-devel@nongnu.org; Mon, 13 Sep 2021 07:57:59 -0400 Received: from mail-wr1-x42e.google.com ([2a00:1450:4864:20::42e]:37844) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1mPkaz-0005td-99 for qemu-devel@nongnu.org; Mon, 13 Sep 2021 07:57:58 -0400 Received: by mail-wr1-x42e.google.com with SMTP id t8so9227074wrq.4 for ; Mon, 13 Sep 2021 04:57:56 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=sender:from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=IBf010dxB3czTGLExguHE9lNbcC2xzM9osq4hO9COOE=; b=FOP5pDtY+mcqqlO1T2TKO0GHd+k+0QFej6cyimmsuEYb1ayLTzkCB6+Heca7PakpPA Jtln/+eAKmx/AQzsPhQBwDSn8kXbCtJ+eV4WraaP9yl6UBiK7Vw7LeRTCUl9JKx8YSgZ 5KORt0wWH5alafMtrp9FnDCxGjK+o3SLMVYslHeFkSN44Y7hiRSLOKyZKovn1eXIjCoH Qr3wA+WxFoFa8lmEg3Ht7m0IDoyFcasBdviddnwIvYHtiX1CCaGmU3AQ3j1CTsYFvKJf AymCuJw8vEzN7Mz3uIQBv6YQktEy2i4+k/1YUuf0O8SBWX9xMwTEkbVVUZKBqwGxktcn 5Lhw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:sender:from:to:cc:subject:date:message-id :in-reply-to:references:mime-version:content-transfer-encoding; bh=IBf010dxB3czTGLExguHE9lNbcC2xzM9osq4hO9COOE=; b=g3S3LRnmh91TecjuXpBrMffjq77qrSaGa22Lhx7wbzMwUWWZpTbgETzoZwbHvaGSTh 5gihFaUYLPsjpRdLNFyZDjpfPPT2HiYbnX5WcNmMCJAIYqzpJPnbGPife1vHKVBbN+Ou bAM/4OReixGkyIGgxwGM2syT80PUkFv5KpJ/ObhAS982WRc91Sz7eegATBk09QY0IA49 orA0KMoxGdFwkcPr786s8DBemibnOMw9/lrKWrBo75RVowFzK6zeWHA02P/VtelNp4LA BEd6CSeSWfpuDndGvjBG+VmzUV5GWW4ykO/E6r19SgjswqNchfC52WUisc0sZvwRg7x0 +B9w== X-Gm-Message-State: AOAM530qTnvr0y+AAXQ9yZpQRU9Kt/PJLzuaxGNQHikxHDHiejrBrTzB 0xMkfie5F8hFxuSElPw/0rpd48r+SXw= X-Google-Smtp-Source: ABdhPJzRJLM7j3MWyjaRoEoKFzViq8xu7MGfll/7DnSi6LHgA2QoXJxhmXgYYqVedZnZ/PaF9FEIrQ== X-Received: by 2002:a5d:6750:: with SMTP id l16mr12004956wrw.174.1631534275996; Mon, 13 Sep 2021 04:57:55 -0700 (PDT) Received: from avogadro.lan ([2001:b07:6468:f312:c8dd:75d4:99ab:290a]) by smtp.gmail.com with ESMTPSA id n186sm6011037wme.31.2021.09.13.04.57.54 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 13 Sep 2021 04:57:55 -0700 (PDT) From: Paolo Bonzini To: qemu-devel@nongnu.org Subject: [PULL 08/21] target/i386: Added vVMLOAD and vVMSAVE feature Date: Mon, 13 Sep 2021 13:57:29 +0200 Message-Id: <20210913115742.533197-9-pbonzini@redhat.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210913115742.533197-1-pbonzini@redhat.com> References: <20210913115742.533197-1-pbonzini@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=2a00:1450:4864:20::42e; envelope-from=paolo.bonzini@gmail.com; helo=mail-wr1-x42e.google.com X-Spam_score_int: -14 X-Spam_score: -1.5 X-Spam_bar: - X-Spam_report: (-1.5 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FORGED_FROMDOMAIN=0.249, FREEMAIL_FROM=0.001, HEADER_FROM_DIFFERENT_DOMAINS=0.25, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Lara Lazier Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" From: Lara Lazier The feature allows the VMSAVE and VMLOAD instructions to execute in guest mode without causing a VMEXIT. (APM2 15.33.1) Signed-off-by: Lara Lazier Signed-off-by: Paolo Bonzini --- target/i386/cpu.h | 2 ++ target/i386/svm.h | 2 ++ target/i386/tcg/sysemu/excp_helper.c | 2 +- target/i386/tcg/sysemu/svm_helper.c | 29 ++++++++++++++++++++++++++++ 4 files changed, 34 insertions(+), 1 deletion(-) diff --git a/target/i386/cpu.h b/target/i386/cpu.h index 6b09b8b62f..71ae3141c3 100644 --- a/target/i386/cpu.h +++ b/target/i386/cpu.h @@ -2261,6 +2261,8 @@ static inline bool ctl_has_irq(CPUX86State *env) return (env->int_ctl & V_IRQ_MASK) && (int_prio >= tpr); } +hwaddr get_hphys(CPUState *cs, hwaddr gphys, MMUAccessType access_type, + int *prot); #if defined(TARGET_X86_64) && \ defined(CONFIG_USER_ONLY) && \ defined(CONFIG_LINUX) diff --git a/target/i386/svm.h b/target/i386/svm.h index 036597a2ff..f9a785489d 100644 --- a/target/i386/svm.h +++ b/target/i386/svm.h @@ -24,6 +24,8 @@ #define V_INTR_MASKING_SHIFT 24 #define V_INTR_MASKING_MASK (1 << V_INTR_MASKING_SHIFT) +#define V_VMLOAD_VMSAVE_ENABLED_MASK (1 << 1) + #define SVM_INTERRUPT_SHADOW_MASK 1 #define SVM_IOIO_STR_SHIFT 2 diff --git a/target/i386/tcg/sysemu/excp_helper.c b/target/i386/tcg/sysemu/excp_helper.c index b6d940e04e..7af887be4d 100644 --- a/target/i386/tcg/sysemu/excp_helper.c +++ b/target/i386/tcg/sysemu/excp_helper.c @@ -358,7 +358,7 @@ do_check_protect_pse36: return error_code; } -static hwaddr get_hphys(CPUState *cs, hwaddr gphys, MMUAccessType access_type, +hwaddr get_hphys(CPUState *cs, hwaddr gphys, MMUAccessType access_type, int *prot) { CPUX86State *env = &X86_CPU(cs)->env; diff --git a/target/i386/tcg/sysemu/svm_helper.c b/target/i386/tcg/sysemu/svm_helper.c index 7bbd3a18c9..6d39611eb6 100644 --- a/target/i386/tcg/sysemu/svm_helper.c +++ b/target/i386/tcg/sysemu/svm_helper.c @@ -120,6 +120,25 @@ static inline bool virtual_gif_enabled(CPUX86State *env) return false; } +static inline bool virtual_vm_load_save_enabled(CPUX86State *env, uint32_t exit_code, uintptr_t retaddr) +{ + uint64_t lbr_ctl; + + if (likely(env->hflags & HF_GUEST_MASK)) { + if (likely(!(env->hflags2 & HF2_NPT_MASK)) || !(env->efer & MSR_EFER_LMA)) { + cpu_vmexit(env, exit_code, 0, retaddr); + } + + lbr_ctl = x86_ldl_phys(env_cpu(env), env->vm_vmcb + offsetof(struct vmcb, + control.lbr_ctl)); + return (env->features[FEAT_SVM] & CPUID_SVM_V_VMSAVE_VMLOAD) + && (lbr_ctl & V_VMLOAD_VMSAVE_ENABLED_MASK); + + } + + return false; +} + static inline bool virtual_gif_set(CPUX86State *env) { return !virtual_gif_enabled(env) || (env->int_ctl & V_GIF_MASK); @@ -431,6 +450,7 @@ void helper_vmload(CPUX86State *env, int aflag) { CPUState *cs = env_cpu(env); target_ulong addr; + int prot; cpu_svm_check_intercept_param(env, SVM_EXIT_VMLOAD, 0, GETPC()); @@ -440,6 +460,10 @@ void helper_vmload(CPUX86State *env, int aflag) addr = (uint32_t)env->regs[R_EAX]; } + if (virtual_vm_load_save_enabled(env, SVM_EXIT_VMLOAD, GETPC())) { + addr = get_hphys(cs, addr, MMU_DATA_LOAD, &prot); + } + qemu_log_mask(CPU_LOG_TB_IN_ASM, "vmload! " TARGET_FMT_lx "\nFS: %016" PRIx64 " | " TARGET_FMT_lx "\n", addr, x86_ldq_phys(cs, addr + offsetof(struct vmcb, @@ -473,6 +497,7 @@ void helper_vmsave(CPUX86State *env, int aflag) { CPUState *cs = env_cpu(env); target_ulong addr; + int prot; cpu_svm_check_intercept_param(env, SVM_EXIT_VMSAVE, 0, GETPC()); @@ -482,6 +507,10 @@ void helper_vmsave(CPUX86State *env, int aflag) addr = (uint32_t)env->regs[R_EAX]; } + if (virtual_vm_load_save_enabled(env, SVM_EXIT_VMSAVE, GETPC())) { + addr = get_hphys(cs, addr, MMU_DATA_STORE, &prot); + } + qemu_log_mask(CPU_LOG_TB_IN_ASM, "vmsave! " TARGET_FMT_lx "\nFS: %016" PRIx64 " | " TARGET_FMT_lx "\n", addr, x86_ldq_phys(cs, -- 2.31.1